I want creat some animation in vex like the Attachment

I saw this on vimeo

Swirly trails
https://vimeo.com/134057856 [vimeo.com]

It's awesome

But i can't found a way to push the dir together like the picture

It's not like I have a spline , then I can get the vel

It's like noise motion

Please help me with this

I'm not sure to understand what you're trying to achive.
Did you try using the edge_dir of curves and noise the position of the result points trails ?

Fragredocroix
I'm not sure to understand what you're trying to achive.
Did you try using the edge_dir of curves and noise the position of the result points trails ?

Just want move Particular with noise,No curves

But want Particular moving like the picture